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Method for separation of air by cryogenic distillation, involves heating gaseous nitrogen flow, and sending part of condensed steam under specific pressure and at specific temperature to mix with air upstream of compressor stage
Method for separation of air by cryogenic distillation, involves heating gaseous nitrogen flow, and sending part of condensed steam under specific pressure and at specific temperature to mix with air upstream of compressor stage
The method involves cooling compressed air (33) from a compressor. The cooled air is sent to a purification unit (65). The purified air is separated by cryogenic distillation to form nitrogen/oxygen enriched fluid. Gaseous nitrogen flow (55) obtained from the distillation is heated by a flow of steam (61) before being used to regenerate an adsorbent bottle to form heated nitrogen and condensed steam (69). Part of the condensed steam under a pressure greater than 100 bars abs and at a temperature of about 100 degrees Celsius is sent to mix with air upstream of a compressor stage (31). An independent claim is also included for an air separation apparatus.
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机译：该方法包括冷却来自压缩机的压缩空气（33）。冷却后的空气被送至净化单元（65）。通过低温蒸馏分离纯化的空气以形成富氮/氧的流体。由蒸馏获得的气态氮气流（55）在被用于再生吸附剂瓶以形成加热的氮气和冷凝蒸汽（69）之前，被蒸汽流（61）加热。在高于100 bar abs的绝对压力和约100摄氏度的温度下，部分冷凝的蒸汽被送入压缩机级（31）的上游与空气混合。空气分离装置也包括独立权利要求。
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